# TP_CheckBusy

## C Specification

      #include <nitro/spi.h>

      u32 TP_CheckBusy( TPRequestCommandFlag command_flgs );

## Description

Checks to see if a touch panel request that has been transmitted to ARM7 is being executed

You can check more than one request simultaneously if you provide the argument with the bitwise OR of multiple flags.

`TP_REQUEST_COMMAND_FLAG_SAMPLING` | Requests to sample one time. Send with `TP_RequestSampling*`.
`TP_REQUEST_COMMAND_FLAG_AUTO_ON` | Requests to start autosampling. Send with `TP_RequestAutoSamplingStart`.
`TP_REQUEST_COMMAND_FLAG_AUTO_OFF` | Requests to stop autosampling. Send with `TP_RequestAutoSamplingStop`.
`TP_REQUEST_COMMAND_FLAG_SET_STABILITY` | Requests to set parameters to counteract chattering. Send with `TP_RequestSetStability`.

Enumeration type definitions for the arguments are shown below.

    // According to the type of instruction issued to the touch panel
    typedef enum {
        TP_REQUEST_COMMAND_FLAG_SAMPLING      =  1 << TP_REQUEST_COMMAND_SAMPLING ,
        TP_REQUEST_COMMAND_FLAG_AUTO_ON       =  1 << TP_REQUEST_COMMAND_AUTO_ON ,
        TP_REQUEST_COMMAND_FLAG_AUTO_OFF      =  1 << TP_REQUEST_COMMAND_AUTO_OFF ,
        TP_REQUEST_COMMAND_FLAG_SET_STABILITY =  1 << TP_REQUEST_COMMAND_SET_STABILITY
    } TPRequestCommandFlag;

## Arguments

`command_flgs` | Specifies the command on which to perform a busy check.

## Return Values

Returns 0 if a request is not being executed. Returns a non-zero value if a request is being executed.

## Revision History

04/19/2004 Initial version